How to go to M.I.T. for free

By the end of this year, the contents of all 1,800 courses taught at one of the world's most prestigious universities will be available online to anyone in the world, anywhere in the world. Learners won't have to register for the classes, and everyone is accepted.

The cost? It's all free of charge.

The OpenCourseWare movement, begun at the Massachusetts Institute of Technology (MIT) in 2002 and now spread to some 120 other universities worldwide, aims to disperse knowledge far beyond the ivy-clad walls of elite campuses to anyone who has an Internet connection and a desire to learn.

Intended as an act of "intellectual philanthropy," OpenCourseWare (OCW) provides free access to course materials such as syllabi, video or audio lectures, notes, homework assignments, illustrations, and so on. So far, by giving away their content, the universities aren't discouraging students from enrolling as students. Instead, the online materials appear to be only whetting appetites for more.

"We believe strongly that education can be best advanced when knowledge is shared openly and freely," says Anne Margulies, executive director of the OCW program at MIT. "MIT is using the power of the Internet to give away all of the educational materials created here."

The MIT site (ocw.mit.edu), along with companion sites that translate the material into other languages, now average about 1.4 million visits per month from learners "in every single country on the planet," Ms. Margulies says. Those include Iraq, Darfur, "even Antarctica," she says. "We hear from [the online students] all the time with inspirational stories about how they are using these materials to change their lives. They're really, really motivated."